CN104236837B - A kind of load shock experimental system and its application method - Google Patents
A kind of load shock experimental system and its application method Download PDFInfo
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- CN104236837B CN104236837B CN201410424421.7A CN201410424421A CN104236837B CN 104236837 B CN104236837 B CN 104236837B CN 201410424421 A CN201410424421 A CN 201410424421A CN 104236837 B CN104236837 B CN 104236837B
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Abstract
The present invention proposes a kind of load shock experimental system, for testing impact resistance of the rod-shaped connectors under under tension loading condition, including：Top beam；Pedestal；Column is arranged between top beam and pedestal, is used to support top beam and pedestal；Suspension apparatus is arranged on top beam, is used for one end of fixing shaft connector；Tensioning pre-tightening apparatus, is set on the base, and is used for the other end of fixing shaft connector, and provides tensile load for rod-shaped connectors；Bearing tray is used to provide impetus for rod-shaped connectors；Weight is used to apply impact force to bearing tray.Load shock experiment is carried out through the invention, will be more in line with the practical rule of onsite application, and authentic testing goes out rod-shaped connectors by ability is absorbed impact in the case of combined stress, really and accurately reference data is provided to site operation.
Description
Technical field
The skill of bearing capacity when the present invention relates to the bodies of rod of test under tension load or rope body by moment impact
Art field, in particular to a kind of load shock experimental system and its application method.
Background technology
Load shock experimental system is domestic and international completely new experimental method, while it is experimental to meet mine scene impact product
Energy.
Load shock experimental system is exactly that loading equipemtn is added in original impact experiment system so that impact experiment meets
It is live practical.The anchor pole or cable bolting product (body of rod trial target) at mine scene are not to existing when by shock loading
It is unloaded lotus (i.e. not under tension load) to have impact experiment, the bodies of rod trial target such as anchor pole or anchor cable, general scene anchor pole or
The bodies of rod trial target such as anchor cable receives 10-20 tons of pretightning forces or the rock pressure of roadway support.The anchor loaded in practical applications
Bar or anchor cable anti-impact force are far smaller than the impact resistance of unloaded anchor pole or anchor cable.Experimental data and field application is caused not to be inconsistent
It closes, now needs to improve experimental system so that experimental system meets field application.
Invention content
A kind of load shock experimental system of present invention proposition and its application method, are being drawn for testing rod-shaped connectors
Impact resistance under power loading condition, the solution prior art cannot test anti-under rod-shaped connectors under tension loading condition
The problem of impact capacity.
Basic thought of the present invention is：Tensioning pre-tightening apparatus is installed in tension weight churning tester base, for rod-shaped connection
Body applies predetermined pull, by the rod-shaped connectors test sample such as anchor pole or anchor cable when not being hit, applies pretightning force so that examination
Sample by with field application same load (i.e. anchor pole or anchor cable are first by 10-20 tons of prefastening forces)；In this way re-test this by
The absorbed impact load of the rod-shaped connectors test sample such as anchor pole or anchor cable of tensile load, will more meet on-site actual situations.
The technical proposal of the invention is realized in this way：
A kind of load shock experimental system, for testing shock resistance energy of the rod-shaped connectors under under tension loading condition
Power, including：Top beam；Pedestal；Column is arranged between top beam and pedestal, is used to support top beam and pedestal；Suspension apparatus,
It is arranged on top beam, is used for one end of fixing shaft connector；Tensioning pre-tightening apparatus, is set on the base, and is used for fixed link
The other end of shape connector, and provide tensile load for rod-shaped connectors；Bearing tray is used to provide for rod-shaped connectors
Impetus；Weight is used to apply impact force to bearing tray.
In the preferred scheme, top beam, column and pedestal form load shock experimental system frame；Weight relies on gravity edge
The extending direction of rod-shaped connectors applies impact force to bearing tray.
In the preferred scheme, rod-shaped connectors are anchor pole, anchor cable, pole stock or rope.
In the preferred scheme, tensioning pre-tightening apparatus be with cavity structure hydraulic jack, including：Hydraulic cylinder, cone
Shape locking device, connect fulcrum bearing and with connect fulcrum bearing connect wall portion；Connection fulcrum bearing and wall portion form described hollow
Cavity configuration, cone locking device connect with hydraulic cylinder and extend in the cavity structure, and cone locking device includes permitting
Perhaps the cavity that rod-shaped connectors pass through；Tensioning pre-tightening apparatus holds rod-shaped connectors, and to rod-shaped when in locking state
Connector provides tensile load.
In the preferred scheme, cone locking device includes：Spring base, the connection housing being connect with spring base, one end is set
The cone-shaped clip set the thrust spring in spring base and connect with the thrust spring other end；Thrust spring is in a relaxed state
It pushes cone-shaped clip, cone-shaped clip to be stuck in outside connection and put on, while axial tension load is provided to rod-shaped connectors.
In the preferred scheme, the load shock experimental system further includes the piston being connect with wall portion, hydraulic cylinder packet
Include the first hydraulic cavities and the second hydraulic cavities, the first hydraulic cavities and the second hydraulic cavities can make piston to opposite both direction back and forth
Movement.
In the preferred scheme, the foil gauge or pressure sensor for detecting stress size are provided on bearing tray.
In the preferred scheme, the foil gauge or pulling force sensor for detecting stress size are provided on suspension apparatus.
A kind of application method of above-mentioned load shock experimental system, includes the following steps：
1) rod-shaped connectors one end is fixed on suspension apparatus, the other end is fixed on tensioning pre-tightening apparatus；
2) bearing tray is arranged in rod-shaped connectors and locks bearing tray；
3) by tensioning pre-tightening apparatus tensile load is provided to rod-shaped connectors；
4) weight is discharged, so that weight is fallen and applies impact force to bearing tray on bearing tray；
5) state of rod-shaped connectors is detected.
In a preferred approach, it is provided with foil gauge on suspension apparatus and bearing tray, executes step 6 after step 5：
6) the mechanical property tracing analysis rod-shaped connectors that the foil gauge observed on suspension apparatus and bearing tray is converted to
In combined stress impact resistance.
Beneficial effects of the present invention are：
Load shock experiment is carried out through the invention, will be more in line with the practical rule of onsite application, authentic testing goes out rod-shaped
Connector provides really and accurately reference data by ability is absorbed impact in the case of combined stress, to site operation.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the structural schematic diagram of the load shock experimental system of the embodiment of the present invention；
Fig. 2 is the schematic diagram of tensioning pre-tightening apparatus in a relaxed state shown in Fig. 1；
Fig. 3 is the schematic diagram of tensioning pre-tightening apparatus in the locked condition shown in Fig. 2.
Reference sign：
Top beam 101, column 102, pedestal 103, suspension apparatus 104, tensioning pre-tightening apparatus 105, weight 106, rod-shaped connection
Body 107, bearing tray 108, connection fulcrum bearing 201, hydraulic cylinder 202, cone locking device 203, wall portion 204, cone-shaped clip
301, thrust spring 302, connection housing 303, piston 304, spring base 305, the first hydraulic cavities 306 and the second hydraulic cavities 307.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1 to Fig. 3, the present embodiment provides a kind of load shock experimental systems, exist for testing rod-shaped connectors 107
Impact resistance under under tension loading condition, including：Top beam 101；Pedestal 103；Column 102 is arranged in 101 He of top beam
Between pedestal 103, it is used to support top beam 101 and pedestal 103；Suspension apparatus 104 is arranged on top beam 101, is used for fixed link
One end of shape connector 107；Tensioning pre-tightening apparatus 105 is arranged on pedestal 103, for the another of fixing shaft connector 107
One end, and provide tensile load for rod-shaped connectors 107；Bearing tray 108 is used to provide for rod-shaped connectors 107
Force；Weight 106 is used to apply impact force to bearing tray 108.Preferably, rod-shaped connectors 107 are anchor pole, anchor cable, bar
Material or rope.
By changing the weight of weight 106 or impact force size can be changed with respect to the height of bearing tray 108.Pass through
Judge the states such as whether rod-shaped connectors 107 are damaged, fracture to examine the impact force ability to bear of rod-shaped connectors 107, due to
This inspection carries out under 107 under tension load condition of rod-shaped connectors, so result will be more in line with reality, more
Accurately.Preferably, the foil gauge or pressure sensor for detecting stress size are provided on bearing tray 108；Suspension apparatus
On be provided with foil gauge or pulling force sensor for detecting stress size.It can be examined by foil gauge distortion measurement rod-shaped
107 stressing conditions of connector and impact condition.
Preferably, top beam 101, column 102 and pedestal 103 form load shock experimental system frame；Weight 106 is by weight
Power applies impact force along the extending direction of rod-shaped connectors 107 to bearing tray 108.
Preferably, tensioning pre-tightening apparatus 105 be with cavity structure hydraulic jack, including：Hydraulic cylinder 202, taper
Locking device 203, connect fulcrum bearing 201 and with connect fulcrum bearing 201 connect wall portion 204；Connect fulcrum bearing 201 and wall portion
204 form cavity structure, and cone locking device 203 connect with hydraulic cylinder 202 and extends in cavity structure, taper lock
Tight device 203 includes the cavity for allowing rod-shaped connectors 107 to pass through；Tensioning pre-tightening apparatus 105 is held when in locking state
Rod-shaped connectors 107, and provide tensile load to rod-shaped connectors 107.
Specifically, cone locking device 203 includes：Spring base 305, the connection housing 303 being connect with spring base 305, one
Hold the thrust spring 302 being arranged in spring base 305 and the cone-shaped clip 301 being connect with 302 other end of thrust spring；Thrust
Spring 302 pushes cone-shaped clip 301 in a relaxed state, and cone-shaped clip 301 is stuck on connection housing 303, while to rod-shaped company
Junctor 107 provides axial tension load.In a relaxed state, it connects the protrusion for including in fulcrum bearing 201 and withstands cone-shaped clip
301, so that thrust spring 302 is compressed, cone-shaped clip 301 is detached with connection housing 303, while unclamping rod-shaped connectors 107.It is rod-shaped
Connector 107 is held by 302 thrust of spring and the locking of 202 pulling force collective effect cone-shaped clip 301 of hydraulic cylinder, tensile load
Size can be determined by 307 hydraulic coupling of the second hydraulic cavities of hydraulic cylinder 202.
Preferably, the present embodiment further includes the piston 304 being connect with wall portion 204, and hydraulic cylinder 202 includes the first hydraulic cavities
306 and second hydraulic cavities 307, the first hydraulic cavities 306 and the second hydraulic cavities 307 can make piston 304 to opposite both direction
It moves back and forth.When to the first 306 injection pressure of hydraulic cavities, spring base 305 and hydraulic cylinder 202 rise, and connect fulcrum bearing 201 and bottom
Seat 103 is connected and fixed motionless (piston 304 is also fixed), while connecting the protrusion in fulcrum bearing 201 and compressing promotion tapered clamp
Piece 301 is shunk, and 301 push the spring 302 of cone-shaped clip and the interior tapered chamber contraction along connection housing 303 reach and connect fulcrum bearing
Raised thrust cone-shaped clip 301 on 201 unclamps the effect of rod-shaped connectors 107；To 307 injection pressure of the second hydraulic cavities
When, spring base 305 and hydraulic cylinder 202 decline, and band flexible spring seat 305 and cone locking device 203 are gradually distance from connection fulcrum bearing
201, so that protrusion and cone-shaped clip 301 in connection fulcrum bearing 201 is separated, reaches 302 thrust of spring and 202 pulling force of hydraulic cylinder is total
Same-action cone-shaped clip 301 clamps the effect for holding rod-shaped connectors 107.
The embodiment of the present invention also provides a kind of application method of above-mentioned load shock experimental system, includes the following steps：
1) 107 one end of rod-shaped connectors is fixed on suspension apparatus 104, the other end is fixed on tensioning pre-tightening apparatus 105
On；
2) bearing tray 108 is arranged in rod-shaped connectors 107 and locks bearing tray 108；
3) by tensioning pre-tightening apparatus 105 tensile load is provided to rod-shaped connectors 107；
4) weight 106 is discharged, so that weight 106 is fallen and applies impact force to bearing tray 108 on bearing tray 108；
5) state of rod-shaped connectors 107 is detected.
Further include following steps when being provided with foil gauge on suspension apparatus 104 and bearing tray 108：
6) the mechanical property tracing analysis that the foil gauge observed on suspension apparatus 104 and bearing tray 108 is converted to is rod-shaped
Connector 107 is in combined stress impact resistance.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (9)
1. a kind of load shock experimental system, for testing anti-impact of the rod-shaped connectors (107) under under tension loading condition
Hit ability, which is characterized in that including：Top beam (101)；Pedestal (103)；Column (102) is arranged in top beam (101) and pedestal
(103) between, top beam (101) and pedestal (103) are used to support；Suspension apparatus (104) is arranged on top beam (101), is used for
One end of fixing shaft connector (107)；Tensioning pre-tightening apparatus (105) is arranged on pedestal (103), is used for fixing shaft
The other end of connector (107), and provide tensile load for rod-shaped connectors (107)；Bearing tray (108), be used for for
Rod-shaped connectors (107) provide impetus；Weight (106) is used to apply impact force to bearing tray (108), and tensioning pre-tightens
Device (105) be with cavity structure hydraulic jack, including：Hydraulic cylinder (202), cone locking device (203), connection branch
Bearing (201) and with connect fulcrum bearing (201) connection wall portion (204)；Connect fulcrum bearing (201) and wall portion (204) formation
The cavity structure, cone locking device (203) connect with hydraulic cylinder (202) and extend in the cavity structure,
Cone locking device (203) includes the cavity for allowing rod-shaped connectors (107) to pass through；Tensioning pre-tightening apparatus (105) is in lock
When tight state, rod-shaped connectors (107) are held, and tensile load is provided to rod-shaped connectors (107).
2. a kind of load shock experimental system according to claim 1, which is characterized in that top beam (101), column (102)
Load shock experimental system frame is formed with pedestal (103)；Weight (106) is by gravity along the extension of rod-shaped connectors (107)
Direction applies impact force to bearing tray (108).
3. a kind of load shock experimental system according to claim 1, which is characterized in that rod-shaped connectors (107) are anchor
Bar, anchor cable, pole stock or rope.
4. a kind of load shock experimental system according to claim 1, which is characterized in that cone locking device (203) wraps
It includes：Spring base (305), the connection housing (303) being connect with spring base (305), the thrust that one end is arranged in spring base (305)
Spring (302) and the cone-shaped clip (301) being connect with thrust spring (302) other end；Thrust spring (302) is in relaxed state
Lower promotion cone-shaped clip (301), cone-shaped clip (301) is stuck on connection housing (303), while being carried to rod-shaped connectors (107)
It is loaded for axial tension.
5. a kind of load shock experimental system according to claim 1, which is characterized in that further include connecting with wall portion (204)
The piston (304) connect, hydraulic cylinder (202) include the first hydraulic cavities (306) and the second hydraulic cavities (307), the first hydraulic cavities (306)
Piston (304) can be made to be moved back and forth to opposite both direction with the second hydraulic cavities (307).
6. a kind of load shock experimental system according to claim 1, which is characterized in that bearing tray is arranged on (108)
It is useful for the foil gauge of detection stress size.
7. a kind of load shock experimental system according to claim 1, which is characterized in that suspension apparatus is arranged on (104)
It is useful for the foil gauge of detection stress size.
8. the application method of the load shock experimental system described in a kind of any one of claim 1-7, which is characterized in that including
Following steps：
1) rod-shaped connectors (107) one end is fixed on suspension apparatus (104), the other end is fixed on tensioning pre-tightening apparatus
(105) on；
2) bearing tray (108) is arranged in rod-shaped connectors (107) and locks bearing tray (108)；
3) by tensioning pre-tightening apparatus (105) tensile load is provided to rod-shaped connectors (107)；
4) release weight (106) makes weight (106) fall and applies impact force to bearing tray (108) on bearing tray (108)；
5) state of detection rod-shaped connectors (107).
9. the application method of load shock experimental system according to claim 8, which is characterized in that in suspension apparatus
(104) and on bearing tray (108) it is provided with foil gauge, further includes following steps：
6) the mechanical property tracing analysis that the foil gauge on observation suspension apparatus (104) and bearing tray (108) is converted to is rod-shaped
Connector (107) is in combined stress impact resistance.
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| CN201410424421.7A CN104236837B (en) | 2014-08-26 | 2014-08-26 | A kind of load shock experimental system and its application method |
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| CN201410424421.7A CN104236837B (en) | 2014-08-26 | 2014-08-26 | A kind of load shock experimental system and its application method |
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| CN104236837B true CN104236837B (en) | 2018-09-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106197925B (en) * | 2016-06-24 | 2018-06-29 | 河南工程学院 | A kind of hydraulic support apparatus for impact testing |
| CN108133645B (en) * | 2017-12-18 | 2023-04-18 | 安徽工程大学 | Impact experiment device and method |
| CN110513377A (en) * | 2019-09-19 | 2019-11-29 | 中国科学院武汉岩土力学研究所 | Locking device and impact device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU800808A1 (en) * | 1978-12-20 | 1981-01-30 | Ордена Ленина И Ордена Трудовогокрасного Знамени Предприятиеп/Я Г-4725 | Device for testing materials for impact tension |
| CN202372410U (en) * | 2011-11-29 | 2012-08-08 | 中国科学院武汉岩土力学研究所 | Anchor rod performance test device |
| WO2013143145A1 (en) * | 2012-03-31 | 2013-10-03 | 中国矿业大学(北京) | Dynamics performance testing system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040261494A1 (en) * | 2003-06-24 | 2004-12-30 | Lee Kun Ta | Impact generating device for impact tester |
| CN102221443B (en) * | 2011-04-07 | 2012-09-05 | 太原理工大学 | Axial force loading device of test piece during lateral impact process |
| CN202101909U (en) * | 2011-07-06 | 2012-01-04 | 湖南科技大学 | Anchor rod drawing force lossless dynamic detecting device |
| CN102279135B (en) * | 2011-07-06 | 2012-12-26 | 湖南科技大学 | Lossless dynamic detection apparatus and method for anchor pile drawing force |
| CN102636397B (en) * | 2012-04-19 | 2014-07-02 | 山西潞安环保能源开发股份有限公司 | Device and method for rapidly testing comprehensive mechanical properties of anchor bolt |
| CN203732235U (en) * | 2014-01-22 | 2014-07-23 | 沈阳工业大学 | Bolt impact fatigue testing machine |
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2014
- 2014-08-26 CN CN201410424421.7A patent/CN104236837B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU800808A1 (en) * | 1978-12-20 | 1981-01-30 | Ордена Ленина И Ордена Трудовогокрасного Знамени Предприятиеп/Я Г-4725 | Device for testing materials for impact tension |
| CN202372410U (en) * | 2011-11-29 | 2012-08-08 | 中国科学院武汉岩土力学研究所 | Anchor rod performance test device |
| WO2013143145A1 (en) * | 2012-03-31 | 2013-10-03 | 中国矿业大学(北京) | Dynamics performance testing system |
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Address after: 271000 north of Fengxiang Road, Tai'an high tech Zone, Tai'an, Shandong. Patentee after: YOULUOKA (SHANDONG) MINING INDUSTRY TECHNOLOGY Co.,Ltd. Address before: 271000 north of Fengxiang Road, Tai'an high tech Zone, Tai'an, Shandong. Patentee before: Euloka (Shandong) Environmental Engineering Co.,Ltd. Address after: 271000 north of Fengxiang Road, Tai'an high tech Zone, Tai'an, Shandong. Patentee after: Euloka (Shandong) Environmental Engineering Co.,Ltd. Address before: 271000 north of Fengxiang Road, Tai'an high tech Zone, Tai'an, Shandong. Patentee before: UROICA (SHANDONG) DEEP GROUND PRESSURE CONTROL AND SAFETY TECHNOLOGY CO.,LTD. |
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